Publicou 12 edições por ano
ISSN Imprimir: 1044-5110
ISSN On-line: 1936-2684
IF:
1.2
5-Year IF:
1.8
Immediacy Index:
0.3
Eigenfactor:
0.00095
JCI:
0.28
SJR:
0.341
SNIP:
0.536
CiteScore™::
1.9
H-Index:
57
Indexed in
DEMONSTRATION OF DIGITAL HOLOGRAPHIC DIAGNOSTICS FOR THE BREAKUP OF LIQUID JETS USING A COMMERCIAL-GRADE CCD SENSOR
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RESUMO
Digital holography was used for drop size and velocity measurements during the breakup of liquid jets because it is unaffected by the nonspherical droplets that are encountered very close to the injector exit, which would otherwise cause problems for techniques such as the phase Doppler particle analyzer. It also works well for observing the very dense spray conditions that are encountered just downstream of the injector exit. In view of the recent advancement in digital holography, the objective of this study was to develop an inexpensive method that provides visualization and measurements of droplet sizes and velocities of a micro-liquid jet. In the present experimental setup, two Nd:YAG lasers are used to generate two independent laser pulses. A commercial CCD sensor (Nikon D-70, ∼$700) is used for recording holograms of micro-liquid jets. By using the commercial-grade CCD sensor instead of research-grade PIV CCD camera for holographic diagnostics, the cost of recording holograms has been reduced from $20K to $0.5K. For the velocity measurement, unlike the case when using a PIV-CCD camera, two images were recorded on the same frame. The in-line holography arrangement reduces the spatial resolution requirements on the CCD sensor, which typically has a much lower resolution than traditional holographic plates. Digital microscopic holography is similar to standard digital in-line holography except that no lens is used to collimate the object beam. The laser beams are expanded with an objective lens (M 5×) and a spatial filter (15 μm pinhole). This eliminates two lenses from the typical optical path used for in-line holography, which results in a much cleaner hologram recording. Moreover, the expanding beam increases the resolution of the setup because the fringes that are needed to reconstruct the image are expanding with the expanding laser beam. As the recording distance is shortened, the resolution is increased.
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Yang Yan, Kang Bo-seon, Digital particle holographic system for measurements of spray field characteristics, Optics and Lasers in Engineering, 49, 11, 2011. Crossref
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Remacha Clément, Coëtmellec Sébastien, Brunel Marc, Lebrun Denis, Digital in-line holography with a rectangular complex coherence factor, Applied Optics, 52, 1, 2013. Crossref
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Sallam Khaled, Lin Kuo-Cheng, Carter Campbell, Spray Structure of Aerated Liquid Jets Using Double-View Digital Holography, 48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition, 2010. Crossref
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Olinger David, Sallam Khaled, Lin Kuo-Cheng, Carter Campbell, Digital Holographic Analysis of Near-Field Aerated Liquid Jets in Crossflow. Part II: Measurements, 51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition, 2013. Crossref
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Lee J., Sallam K.A., Three-dimensional trajectory of electrospun polymer solution jet using digital holographic microscopy, Polymer Engineering & Science, 54, 8, 2014. Crossref
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Olinger D. S., Sallam K. A., Lin K.-C., Carter C. D., Digital Holographic Analysis of the Near Field of Aerated-Liquid Jets in Crossflow, Journal of Propulsion and Power, 30, 6, 2014. Crossref
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Jones Alan R., Light Scattering in Combustion: New Developments, in Springer Series in Light Scattering, 2018. Crossref
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Sallam Khaled A., Lin Kuo-Cheng, Hammack Stephen D., Carter Campbell D., Digital Holographic Analysis of the Breakup of Aerated Liquid Jets in Supersonic Crossflow, 55th AIAA Aerospace Sciences Meeting, 2017. Crossref
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Guildenbecher Daniel R., Reu Phillip L., Gao Jian, Chen Jun, Experimental methods to quantify the accuracy of 3D particle field measurements via digital holography, Digital Holography and Three-Dimensional Imaging, 2013. Crossref
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Olinger David, Lee Jaiho, Osta Anu, Sallam Khaled, Lin Kuo-Cheng, Carter Campbell, Digital Holographic Analysis of Near-Field Aerated Liquid Jets in Crossflow. Part I: Algorithm Development, 51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition, 2013. Crossref
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Osta Anu, Imaging Diagnostics for Jet Breakup into Droplets: A Review, in Fundamental Research and Application of Droplet Dynamics, 2022. Crossref